Erick / Mbed 2 deprecated ICE_BLE_TEST

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Dependencies:   NaturalTinyShell_ice libmDot-12Sept mbed-rtos mbed

Fork of ICE by Erick

src/ModbusMaster/ModbusMaster.cpp@150:4db35c8234b4, 2016-09-30 (annotated)

Committer:
davidjhoward
Date:
Fri Sep 30 13:35:28 2016 +0000
Revision:
150:4db35c8234b4
Parent:
149:950c90425f7c
Child:
151:9d47fe5ba805
more work towards virtual inputs

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jmarkel44 0:65cfa4873284 1 /******************************************************************************
davidjhoward 4:c35db3946fd8 2 *
jmarkel44 0:65cfa4873284 3 * File: ModbusMaster.cpp
jmarkel44 0:65cfa4873284 4 * Desciption: source for the ICE Modbus Master
jmarkel44 0:65cfa4873284 5 *
jmarkel44 0:65cfa4873284 6 *****************************************************************************/
jmarkel44 0:65cfa4873284 7 #include "global.h"
jmarkel44 0:65cfa4873284 8 #include <stdio.h>
davidjhoward 31:4b1587034318 9 #include "MTSLog.h"
jmarkel44 0:65cfa4873284 10 #include "BLEDataHandler.h"
davidjhoward 4:c35db3946fd8 11 #include "ModbusMaster.h"
davidjhoward 8:abe51ae5ef8b 12 #include "MbedJSONValue.h"
jmarkel44 0:65cfa4873284 13
davidjhoward 81:d45bfa16953a 14 DigitalOut dout1(PC_1);
davidjhoward 81:d45bfa16953a 15 DigitalOut dout2(PA_1);
davidjhoward 148:ee3cbaafe355 16 DigitalIn flow_switch(PA_0);
davidjhoward 148:ee3cbaafe355 17 DigitalIn dinp2(PC_13);
davidjhoward 81:d45bfa16953a 18
jmarkel44 0:65cfa4873284 19 /*****************************************************************************
jmarkel44 0:65cfa4873284 20 * Function: ModbusMaster
jmarkel44 0:65cfa4873284 21 * Description: entry point for the Modbus Master
jmarkel44 0:65cfa4873284 22 *
jmarkel44 0:65cfa4873284 23 * @param (IN) args (user-defined arguments)
jmarkel44 0:65cfa4873284 24 * @return none
jmarkel44 0:65cfa4873284 25 *****************************************************************************/
davidjhoward 149:950c90425f7c 26 std::map<std::string,VirtualCommand> VirtualCommandMap;
davidjhoward 149:950c90425f7c 27
davidjhoward 42:c703a60993b1 28 char ModbusMasterScratchBuf[1024];
jmarkel44 0:65cfa4873284 29 void ModbusMaster(void const *args)
jmarkel44 0:65cfa4873284 30 {
davidjhoward 31:4b1587034318 31 logInfo("%s ModbusMaster has started...", __func__);
davidjhoward 15:a6ee32969e8e 32 bool status;
davidjhoward 149:950c90425f7c 33 RegisterType_t regType;
davidjhoward 82:f3e495a98877 34 bool move_up = true;
davidjhoward 8:abe51ae5ef8b 35 MbedJSONValue json_value;
davidjhoward 81:d45bfa16953a 36
davidjhoward 54:ec1b03064bbd 37 modbus_init(MB_BAUD_RATE);
davidjhoward 54:ec1b03064bbd 38 DigitalOut flu_power(PA_11);
davidjhoward 54:ec1b03064bbd 39 flu_power = 0; // provide power to the modbus
jmarkel44 0:65cfa4873284 40
davidjhoward 39:9287c7d59016 41 while( true ) {
davidjhoward 8:abe51ae5ef8b 42
davidjhoward 39:9287c7d59016 43 // configure modbus registers based in all files that start with "input"
davidjhoward 39:9287c7d59016 44 std::vector<mDot::mdot_file> file_list = GLOBAL_mdot->listUserFiles();
davidjhoward 39:9287c7d59016 45 for (std::vector<mDot::mdot_file>::iterator i = file_list.begin(); i != file_list.end(); ++i) {
davidjhoward 8:abe51ae5ef8b 46
davidjhoward 149:950c90425f7c 47 if( (strncmp( i->name, "vcmd", (strlen("input")-1)) == 0) ) {
davidjhoward 149:950c90425f7c 48 status = GLOBAL_mdot->readUserFile(i->name, ModbusMasterScratchBuf, 1024);
davidjhoward 149:950c90425f7c 49 if( status != true ) {
davidjhoward 149:950c90425f7c 50 logInfo("(%d)read file failed, status=%d", __LINE__, status);
davidjhoward 149:950c90425f7c 51 } else {
davidjhoward 149:950c90425f7c 52 logInfo("(%d)Read File SUCCESS: %s", __LINE__, ModbusMasterScratchBuf );
davidjhoward 149:950c90425f7c 53 }
davidjhoward 8:abe51ae5ef8b 54
davidjhoward 149:950c90425f7c 55 parse( json_value, ModbusMasterScratchBuf );
davidjhoward 149:950c90425f7c 56
davidjhoward 149:950c90425f7c 57 std::string id = json_value["id"].get<std::string>().c_str();
davidjhoward 149:950c90425f7c 58 VirtualCommandMap[id].constant = atof(json_value["constant"].get<std::string>().c_str());
davidjhoward 149:950c90425f7c 59 VirtualCommandMap[id].opl = json_value["opl"].get<std::string>().c_str();
davidjhoward 149:950c90425f7c 60 VirtualCommandMap[id].opr = json_value["opr"].get<std::string>().c_str();
davidjhoward 149:950c90425f7c 61 VirtualCommandMap[id].op = json_value["op"].get<std::string>().c_str();
davidjhoward 149:950c90425f7c 62 printf("\rProcessd virtual command file: id=%s\r\n", id.c_str());
davidjhoward 149:950c90425f7c 63 continue;
davidjhoward 149:950c90425f7c 64 }
davidjhoward 149:950c90425f7c 65
davidjhoward 149:950c90425f7c 66 regType = REG_TYPE_NONE;
davidjhoward 149:950c90425f7c 67
davidjhoward 149:950c90425f7c 68 if( (strncmp( i->name, "input", (strlen("input")-1)) == 0) ) {
davidjhoward 149:950c90425f7c 69 regType = REG_TYPE_INPUT;
davidjhoward 149:950c90425f7c 70 } else if( (strncmp( i->name, "output", (strlen("output")-1)) == 0) ) {
davidjhoward 149:950c90425f7c 71 regType = REG_TYPE_OUTPUT;
davidjhoward 149:950c90425f7c 72 } else if( (strncmp( i->name, "vinput", (strlen("vinput")-1)) == 0) ) {
davidjhoward 149:950c90425f7c 73 regType = REG_TYPE_VINPUT;
davidjhoward 149:950c90425f7c 74 } else if( (strncmp( i->name, "voutput", (strlen("voutput")-1)) == 0) ) {
davidjhoward 149:950c90425f7c 75 regType = REG_TYPE_VOUTPUT;
davidjhoward 149:950c90425f7c 76 }
davidjhoward 149:950c90425f7c 77
davidjhoward 149:950c90425f7c 78 if( regType != REG_TYPE_NONE ) {
davidjhoward 81:d45bfa16953a 79
davidjhoward 81:d45bfa16953a 80 logInfo("(%d)FOUND FILE: %s", __LINE__, i->name);
davidjhoward 42:c703a60993b1 81
davidjhoward 49:0456ee2271be 82 status = GLOBAL_mdot->readUserFile(i->name, ModbusMasterScratchBuf, 1024);
davidjhoward 39:9287c7d59016 83 if( status != true ) {
davidjhoward 45:3b9e1923cb15 84 logInfo("(%d)read file failed, status=%d", __LINE__, status);
davidjhoward 39:9287c7d59016 85 } else {
davidjhoward 45:3b9e1923cb15 86 logInfo("(%d)Read File SUCCESS: %s", __LINE__, ModbusMasterScratchBuf );
davidjhoward 39:9287c7d59016 87 }
davidjhoward 81:d45bfa16953a 88
davidjhoward 42:c703a60993b1 89 parse( json_value, ModbusMasterScratchBuf );
davidjhoward 9:ef0ca2f8a8a6 90
davidjhoward 39:9287c7d59016 91 std::string id = json_value["id"].get<std::string>().c_str();
davidjhoward 39:9287c7d59016 92 ModbusRegisterMap[id].name = json_value["name"].get<std::string>().c_str();
davidjhoward 39:9287c7d59016 93 ModbusRegisterMap[id].units = json_value["units"].get<std::string>().c_str();
davidjhoward 39:9287c7d59016 94 ModbusRegisterMap[id].min = atof(json_value["min"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 95 ModbusRegisterMap[id].max = atof(json_value["max"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 96 ModbusRegisterMap[id].node = atoi(json_value["node"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 97 ModbusRegisterMap[id].reg = atoi(json_value["reg"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 98 ModbusRegisterMap[id].rtype = atoi(json_value["rtype"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 99 ModbusRegisterMap[id].type = atoi(json_value["type"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 100 ModbusRegisterMap[id].size = atoi(json_value["size"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 101 ModbusRegisterMap[id].order = atoi(json_value["order"].get<std::string>().c_str());
davidjhoward 39:9287c7d59016 102 ModbusRegisterMap[id].fmt = json_value["fmt"].get<std::string>().c_str();
davidjhoward 49:0456ee2271be 103 ModbusRegisterMap[id].rfreq = atoi(json_value["rfreq"].get<std::string>().c_str());
davidjhoward 149:950c90425f7c 104 ModbusRegisterMap[id].regType = regType;
davidjhoward 82:f3e495a98877 105 ModbusRegisterMap[id].simulated = false;
davidjhoward 148:ee3cbaafe355 106 ModbusRegisterMap[id].valid = true;
davidjhoward 149:950c90425f7c 107 if( (regType == REG_TYPE_VINPUT) || (regType == REG_TYPE_VOUTPUT) ) {
davidjhoward 149:950c90425f7c 108 ModbusRegisterMap[id].vcmd = json_value["vcmd"].get<std::string>().c_str();
davidjhoward 149:950c90425f7c 109 }
davidjhoward 15:a6ee32969e8e 110 }
davidjhoward 4:c35db3946fd8 111 }
davidjhoward 31:4b1587034318 112
davidjhoward 39:9287c7d59016 113 // read modbus registers that have been configured.
davidjhoward 39:9287c7d59016 114 while ( true ) {
davidjhoward 39:9287c7d59016 115
davidjhoward 39:9287c7d59016 116 std::map<std::string, ModbusRegister>::iterator iter;
davidjhoward 39:9287c7d59016 117 for (iter = ModbusRegisterMap.begin(); iter != ModbusRegisterMap.end(); ++iter) {
davidjhoward 82:f3e495a98877 118 if( iter->second.simulated == true ) {
davidjhoward 149:950c90425f7c 119 std::map<std::string, SimulateInput>::iterator simiter;
davidjhoward 149:950c90425f7c 120 for (simiter = SimulateInputMap.begin(); simiter != SimulateInputMap.end(); ++simiter) {
davidjhoward 150:4db35c8234b4 121 // logInfo("simulating input=%s, min=%2.2f, max=%2.2f, start_value=%2.2f, up_step=%2.2f, down_step=%2.2f",iter->first.c_str(), SimulateInputMap[iter->first].min, SimulateInputMap[iter->first].max, SimulateInputMap[iter->first].start_value, SimulateInputMap[iter->first].up_step, SimulateInputMap[iter->first].down_step);
davidjhoward 82:f3e495a98877 122 if( (SimulateInputMap[iter->first].min == 0) && (SimulateInputMap[iter->first].max == 0) ) {
davidjhoward 82:f3e495a98877 123 ModbusRegisterMap[iter->first].float_value = SimulateInputMap[iter->first].start_value;
davidjhoward 82:f3e495a98877 124 } else {
davidjhoward 82:f3e495a98877 125 if( ModbusRegisterMap[iter->first].float_value >= SimulateInputMap[iter->first].max ) {
davidjhoward 82:f3e495a98877 126 move_up = false;
davidjhoward 150:4db35c8234b4 127 ModbusRegisterMap[iter->first].float_value = ModbusRegisterMap[iter->first].float_value - SimulateInputMap[iter->first].down_step;
davidjhoward 82:f3e495a98877 128 } else if( ModbusRegisterMap[iter->first].float_value <= SimulateInputMap[iter->first].min ) {
davidjhoward 82:f3e495a98877 129 move_up = true;
davidjhoward 150:4db35c8234b4 130 ModbusRegisterMap[iter->first].float_value = ModbusRegisterMap[iter->first].float_value + SimulateInputMap[iter->first].up_step;
davidjhoward 82:f3e495a98877 131 } else {
davidjhoward 82:f3e495a98877 132 if( move_up == true ) {
davidjhoward 150:4db35c8234b4 133 ModbusRegisterMap[iter->first].float_value = ModbusRegisterMap[iter->first].float_value + SimulateInputMap[iter->first].up_step;
davidjhoward 82:f3e495a98877 134 } else {
davidjhoward 150:4db35c8234b4 135 ModbusRegisterMap[iter->first].float_value = ModbusRegisterMap[iter->first].float_value - SimulateInputMap[iter->first].down_step;
davidjhoward 82:f3e495a98877 136 }
davidjhoward 82:f3e495a98877 137 }
davidjhoward 147:105bcf234f81 138 logInfo("simulating input=%s, value=%2.2f",iter->first.c_str(), ModbusRegisterMap[iter->first].float_value);
davidjhoward 82:f3e495a98877 139 }
davidjhoward 82:f3e495a98877 140 }
davidjhoward 82:f3e495a98877 141 continue;
davidjhoward 82:f3e495a98877 142 }
davidjhoward 148:ee3cbaafe355 143
davidjhoward 147:105bcf234f81 144 if( iter->second.node != 0 ) {
davidjhoward 148:ee3cbaafe355 145
davidjhoward 149:950c90425f7c 146 logInfo("Processing Input: tag=%s, node=%d, reg=%d, size=%d, order=%d", iter->first.c_str(), iter->second.node, iter->second.reg, iter->second.size, iter->second.order );
davidjhoward 147:105bcf234f81 147 SendModbusCommand(iter->second.node, iter->second.reg, iter->second.size);
davidjhoward 147:105bcf234f81 148 Thread::wait(30);
davidjhoward 147:105bcf234f81 149 switch( iter->second.type ) {
davidjhoward 147:105bcf234f81 150 case TYPE_32BIT_FLOAT:
davidjhoward 147:105bcf234f81 151 float float_value;
davidjhoward 147:105bcf234f81 152 status = ReadModbus_32bit_float( &float_value, iter->second.order );
davidjhoward 147:105bcf234f81 153 if( status == true ) {
davidjhoward 147:105bcf234f81 154 ModbusRegisterMap[iter->first].float_value = float_value;
davidjhoward 148:ee3cbaafe355 155 ModbusRegisterMap[iter->first].valid = true;
davidjhoward 148:ee3cbaafe355 156 // logInfo("Modbus Tag:%s value=%2.2f", iter->first.c_str(), float_value );
davidjhoward 147:105bcf234f81 157 } else {
davidjhoward 148:ee3cbaafe355 158 ModbusRegisterMap[iter->first].valid = false;
davidjhoward 148:ee3cbaafe355 159 // logInfo("Modbus Read Failed, tag=%s", iter->first.c_str() );
davidjhoward 147:105bcf234f81 160 }
davidjhoward 147:105bcf234f81 161 break;
davidjhoward 147:105bcf234f81 162 case TYPE_32BIT_INT:
davidjhoward 147:105bcf234f81 163 break;
davidjhoward 147:105bcf234f81 164 case TYPE_32BIT_UINT:
davidjhoward 147:105bcf234f81 165 break;
davidjhoward 147:105bcf234f81 166 case TYPE_16BIT_INT:
davidjhoward 147:105bcf234f81 167 break;
davidjhoward 147:105bcf234f81 168 case TYPE_16BIT_UINT:
davidjhoward 147:105bcf234f81 169 break;
davidjhoward 147:105bcf234f81 170 default:
davidjhoward 147:105bcf234f81 171 break;
davidjhoward 147:105bcf234f81 172 }
davidjhoward 39:9287c7d59016 173 }
davidjhoward 82:f3e495a98877 174
davidjhoward 149:950c90425f7c 175 if( (iter->second.node == 0) && (iter->second.regType == REG_TYPE_OUTPUT) ) {
davidjhoward 148:ee3cbaafe355 176 // logInfo("processing PIN output=%s, reg=%d, value=%d",iter->first.c_str(), ModbusRegisterMap[iter->first].reg, (bool)ModbusRegisterMap[iter->first].float_value);
davidjhoward 148:ee3cbaafe355 177 if( ModbusRegisterMap[iter->first].reg == 1 ) {
davidjhoward 148:ee3cbaafe355 178 dout1 = (bool)ModbusRegisterMap[iter->first].float_value;
davidjhoward 148:ee3cbaafe355 179 } else {
davidjhoward 148:ee3cbaafe355 180 dout2 = (bool)ModbusRegisterMap[iter->first].float_value;
davidjhoward 148:ee3cbaafe355 181 }
davidjhoward 148:ee3cbaafe355 182 }
davidjhoward 149:950c90425f7c 183 if( (iter->second.node == 0) && (iter->second.regType == REG_TYPE_INPUT) ) {
davidjhoward 148:ee3cbaafe355 184 // logInfo("processing PIN input=%s, reg=%d, value=%d",iter->first.c_str(), ModbusRegisterMap[iter->first].reg, (bool)ModbusRegisterMap[iter->first].float_value);
davidjhoward 148:ee3cbaafe355 185 if( ModbusRegisterMap[iter->first].reg == 1 ) {
davidjhoward 148:ee3cbaafe355 186 // digital input
davidjhoward 148:ee3cbaafe355 187 ModbusRegisterMap[iter->first].float_value = (float)flow_switch.read();
davidjhoward 148:ee3cbaafe355 188 } else {
davidjhoward 148:ee3cbaafe355 189 ModbusRegisterMap[iter->first].float_value = (float)dinp2.read();
davidjhoward 81:d45bfa16953a 190 }
davidjhoward 81:d45bfa16953a 191 }
davidjhoward 39:9287c7d59016 192 }
davidjhoward 39:9287c7d59016 193
davidjhoward 149:950c90425f7c 194 // now update all of the virtual registers
davidjhoward 149:950c90425f7c 195 for (iter = ModbusRegisterMap.begin(); iter != ModbusRegisterMap.end(); ++iter) {
davidjhoward 149:950c90425f7c 196 if( (ModbusRegisterMap[iter->first].regType != REG_TYPE_VINPUT) && (ModbusRegisterMap[iter->first].regType != REG_TYPE_VOUTPUT) ) {
davidjhoward 149:950c90425f7c 197 continue;
davidjhoward 149:950c90425f7c 198 }
davidjhoward 149:950c90425f7c 199 logInfo("Processing Virtual Input: vcmd:%s, tag:%s, opl:%s, opr:%s, op:%s, constant:%.4f", iter->second.vcmd.c_str(), iter->first.c_str(),
davidjhoward 149:950c90425f7c 200 VirtualCommandMap[iter->second.vcmd].opl.c_str(),
davidjhoward 149:950c90425f7c 201 VirtualCommandMap[iter->second.vcmd].opr.c_str(),
davidjhoward 149:950c90425f7c 202 VirtualCommandMap[iter->second.vcmd].op.c_str(),
davidjhoward 149:950c90425f7c 203 VirtualCommandMap[iter->second.vcmd].constant
davidjhoward 149:950c90425f7c 204 );
davidjhoward 149:950c90425f7c 205 switch( VirtualCommandMap[iter->second.vcmd].op.c_str()[0] ) {
davidjhoward 149:950c90425f7c 206 case '=':
davidjhoward 149:950c90425f7c 207 ModbusRegisterMap[iter->first].float_value = ModbusRegisterMap[VirtualCommandMap[iter->second.vcmd].opl].float_value;
davidjhoward 149:950c90425f7c 208 logInfo("Setting tag=%s, equal to (value=%2.2f)", iter->first.c_str(),
davidjhoward 149:950c90425f7c 209 VirtualCommandMap[iter->second.vcmd].opl.c_str(),
davidjhoward 149:950c90425f7c 210 ModbusRegisterMap[VirtualCommandMap[iter->second.vcmd].opl].float_value
davidjhoward 149:950c90425f7c 211 );
davidjhoward 149:950c90425f7c 212 break;
davidjhoward 149:950c90425f7c 213 case '*':
davidjhoward 149:950c90425f7c 214 case '/':
davidjhoward 149:950c90425f7c 215 case '+':
davidjhoward 149:950c90425f7c 216 case '-':
davidjhoward 149:950c90425f7c 217 default:
davidjhoward 149:950c90425f7c 218 break;
davidjhoward 149:950c90425f7c 219 }
davidjhoward 149:950c90425f7c 220 }
davidjhoward 149:950c90425f7c 221
davidjhoward 39:9287c7d59016 222 osEvent evt = ModbusMasterMailBox.get(50);
davidjhoward 39:9287c7d59016 223 if (evt.status == osEventMail) {
davidjhoward 39:9287c7d59016 224 Message_t *mail = (Message_t*)evt.value.p;
davidjhoward 39:9287c7d59016 225 logInfo("Mail Received: Action: %d, New Input File: %s", mail->action, mail->controlFile);
davidjhoward 39:9287c7d59016 226 ModbusMasterMailBox.free(mail);
davidjhoward 39:9287c7d59016 227 ModbusRegisterMap.clear();
davidjhoward 39:9287c7d59016 228 break;
davidjhoward 39:9287c7d59016 229 }
davidjhoward 57:5f18ae91c7c7 230 Thread::wait(5000);
davidjhoward 31:4b1587034318 231 }
jmarkel44 0:65cfa4873284 232 }
davidjhoward 4:c35db3946fd8 233 }
davidjhoward 4:c35db3946fd8 234
davidjhoward 4:c35db3946fd8 235
davidjhoward 4:c35db3946fd8 236 volatile char modbus_buffer_char;
davidjhoward 4:c35db3946fd8 237 volatile bool modbus_interrupt_complete = false;
davidjhoward 4:c35db3946fd8 238
davidjhoward 4:c35db3946fd8 239 uint8_t modbus_input_buffer[SIZE_MB_BUFFER];// 1byte address + 1 byte function +1 byte number of regs + 12 bytes of data + 2 bytes for crc response frame from slave
davidjhoward 4:c35db3946fd8 240 volatile uint8_t modbus_input_buffer_counter = 0;
davidjhoward 4:c35db3946fd8 241
davidjhoward 4:c35db3946fd8 242 //Frame crc calucation
davidjhoward 4:c35db3946fd8 243 uint16_t modbus_crc(uint8_t* buf, int len)
davidjhoward 4:c35db3946fd8 244 {
davidjhoward 4:c35db3946fd8 245 uint16_t crc = 0xFFFF;
davidjhoward 4:c35db3946fd8 246
davidjhoward 4:c35db3946fd8 247 for (int pos = 0; pos < len; pos++) {
davidjhoward 4:c35db3946fd8 248 crc ^= (uint16_t)buf[pos]; // XOR byte into least sig. byte of crc
davidjhoward 4:c35db3946fd8 249
davidjhoward 4:c35db3946fd8 250 for (int i = 8; i != 0; i--) {
davidjhoward 4:c35db3946fd8 251 // Loop over each bit
davidjhoward 4:c35db3946fd8 252 if ((crc & 0x0001) != 0) {
davidjhoward 4:c35db3946fd8 253 // If the LSB is set
davidjhoward 4:c35db3946fd8 254 crc >>= 1; // Shift right and XOR 0xA001
davidjhoward 4:c35db3946fd8 255 crc ^= 0xA001;
davidjhoward 4:c35db3946fd8 256 } else // Else LSB is not set
davidjhoward 4:c35db3946fd8 257 crc >>= 1; // Just shift right
davidjhoward 4:c35db3946fd8 258 }
davidjhoward 4:c35db3946fd8 259 }
davidjhoward 4:c35db3946fd8 260 // Note, this number has low and high bytes swapped, so use it accordingly (or swap bytes)
davidjhoward 4:c35db3946fd8 261 return crc;
davidjhoward 4:c35db3946fd8 262 }
davidjhoward 4:c35db3946fd8 263
davidjhoward 4:c35db3946fd8 264 RawSerial modbus(PA_2, PA_3);
davidjhoward 57:5f18ae91c7c7 265 DigitalOut mod_de(PB_0);
davidjhoward 57:5f18ae91c7c7 266 DigitalOut mod_re(PB_1);
davidjhoward 4:c35db3946fd8 267
davidjhoward 4:c35db3946fd8 268 void modbus_init( uint16_t baudRate )
davidjhoward 4:c35db3946fd8 269 {
davidjhoward 4:c35db3946fd8 270 modbus.baud(baudRate);
davidjhoward 4:c35db3946fd8 271 modbus.attach(&modbus_recv, RawSerial::RxIrq);
davidjhoward 4:c35db3946fd8 272 }
davidjhoward 4:c35db3946fd8 273
davidjhoward 4:c35db3946fd8 274 //call back when character goes into RX buffer for RS485 modbus
davidjhoward 4:c35db3946fd8 275 void modbus_recv()
davidjhoward 4:c35db3946fd8 276 {
davidjhoward 4:c35db3946fd8 277
davidjhoward 4:c35db3946fd8 278 if (modbus.readable()) {
davidjhoward 4:c35db3946fd8 279 modbus_buffer_char = modbus.getc();
davidjhoward 4:c35db3946fd8 280 if (modbus_input_buffer_counter == 0 && modbus_buffer_char == 0x00) {
davidjhoward 4:c35db3946fd8 281 modbus_input_buffer_counter = 0;
davidjhoward 4:c35db3946fd8 282 } else {
davidjhoward 4:c35db3946fd8 283 modbus_input_buffer[modbus_input_buffer_counter] = modbus_buffer_char;
davidjhoward 4:c35db3946fd8 284 modbus_input_buffer_counter++;
davidjhoward 4:c35db3946fd8 285 }
davidjhoward 4:c35db3946fd8 286 }
davidjhoward 4:c35db3946fd8 287
davidjhoward 4:c35db3946fd8 288 if (modbus_input_buffer_counter > modbus_input_buffer[2] + 4) {
davidjhoward 4:c35db3946fd8 289 modbus_interrupt_complete = true;
davidjhoward 4:c35db3946fd8 290 modbus_input_buffer_counter = 0;
davidjhoward 4:c35db3946fd8 291 }
davidjhoward 4:c35db3946fd8 292 }
davidjhoward 4:c35db3946fd8 293
davidjhoward 4:c35db3946fd8 294 // Read modbus master frame
davidjhoward 9:ef0ca2f8a8a6 295 void SendModbusCommand(uint8_t slave_address, uint16_t firstReg, uint16_t noRegs)
davidjhoward 4:c35db3946fd8 296 {
davidjhoward 4:c35db3946fd8 297 uint8_t L1V[8] = {slave_address, 0x04, 0x00, 0x02, 0x00, 0x02, 0xD1, 0x16};
davidjhoward 4:c35db3946fd8 298
davidjhoward 4:c35db3946fd8 299 L1V[2] = (firstReg >> 8) & 0xFF;
davidjhoward 4:c35db3946fd8 300 L1V[3] = firstReg & 0xFF;
davidjhoward 4:c35db3946fd8 301 L1V[4] = (noRegs >> 8) & 0xFF;
davidjhoward 4:c35db3946fd8 302 L1V[5] = noRegs & 0xFF;
davidjhoward 4:c35db3946fd8 303 L1V[6] = modbus_crc(L1V,6) & 0xFF;
davidjhoward 4:c35db3946fd8 304 L1V[7] = (modbus_crc(L1V,6)>>8) & 0xFF;
davidjhoward 4:c35db3946fd8 305
davidjhoward 57:5f18ae91c7c7 306 mod_de = 1;
davidjhoward 57:5f18ae91c7c7 307 mod_re = 1;
davidjhoward 57:5f18ae91c7c7 308 Thread::wait(1);
davidjhoward 4:c35db3946fd8 309 for (uint8_t i = 0; i < 8; i++)
davidjhoward 4:c35db3946fd8 310 modbus.putc(L1V[i]);
davidjhoward 4:c35db3946fd8 311
davidjhoward 57:5f18ae91c7c7 312 Thread::wait(2);
davidjhoward 57:5f18ae91c7c7 313 mod_de = 0;
davidjhoward 57:5f18ae91c7c7 314 mod_re = 0;
davidjhoward 4:c35db3946fd8 315
davidjhoward 4:c35db3946fd8 316 }
davidjhoward 4:c35db3946fd8 317
davidjhoward 4:c35db3946fd8 318 bool mbInterruptComplete()
davidjhoward 4:c35db3946fd8 319 {
davidjhoward 4:c35db3946fd8 320 if (modbus_interrupt_complete) {
davidjhoward 4:c35db3946fd8 321 modbus_interrupt_complete = false;
davidjhoward 4:c35db3946fd8 322 return true;
davidjhoward 4:c35db3946fd8 323 } else {
davidjhoward 4:c35db3946fd8 324 return false;
davidjhoward 4:c35db3946fd8 325 }
davidjhoward 4:c35db3946fd8 326 }
davidjhoward 4:c35db3946fd8 327
davidjhoward 15:a6ee32969e8e 328 bool ReadModbus_32bit_float( float *float_value, int order )
davidjhoward 4:c35db3946fd8 329 {
davidjhoward 15:a6ee32969e8e 330 MR_REGISTER_32_BIT_FLOAT value;
davidjhoward 31:4b1587034318 331
davidjhoward 4:c35db3946fd8 332 if (mbInterruptComplete() != true ) {
davidjhoward 4:c35db3946fd8 333 return false;
davidjhoward 4:c35db3946fd8 334 }
davidjhoward 4:c35db3946fd8 335
davidjhoward 15:a6ee32969e8e 336 switch( order ) {
davidjhoward 31:4b1587034318 337 case BigEndian:
davidjhoward 15:a6ee32969e8e 338 value.b.lo_lo = modbus_input_buffer[6];
davidjhoward 15:a6ee32969e8e 339 value.b.lo_hi = modbus_input_buffer[5];
davidjhoward 15:a6ee32969e8e 340 value.b.hi_lo = modbus_input_buffer[4];
davidjhoward 15:a6ee32969e8e 341 value.b.hi_hi = modbus_input_buffer[3];
davidjhoward 15:a6ee32969e8e 342 break;
davidjhoward 15:a6ee32969e8e 343 case BigEndianReverseWord:
davidjhoward 15:a6ee32969e8e 344 value.b.lo_lo = modbus_input_buffer[4];
davidjhoward 15:a6ee32969e8e 345 value.b.lo_hi = modbus_input_buffer[3];
davidjhoward 15:a6ee32969e8e 346 value.b.hi_lo = modbus_input_buffer[6];
davidjhoward 15:a6ee32969e8e 347 value.b.hi_hi = modbus_input_buffer[5];
davidjhoward 15:a6ee32969e8e 348 break;
davidjhoward 15:a6ee32969e8e 349 default:
davidjhoward 15:a6ee32969e8e 350 return false;
davidjhoward 15:a6ee32969e8e 351 }
davidjhoward 15:a6ee32969e8e 352 *float_value = value.f;
davidjhoward 4:c35db3946fd8 353 return true;
davidjhoward 4:c35db3946fd8 354 }